"Silly" is a strong word. I imagine one of the points would be that a native app has direct access to your filesystem so you'd rather have users be cautious with it?
But I agree that having in native apps the UI patterns people are used to seeing in webapps is simpler for the majority of users.
But I agree that having in native apps the UI patterns people are used to seeing in webapps is simpler for the majority of users.